Thomas shaffek



2 Sheets-Sheet 14.

(No Model.)

T. SHAFPER.

ROLLING- MILL.

No. 276,086. x Patentd A p1 '.17, 1883-.

mama.

I. PETERS, Hmo-Lnmgn hr. w

NITED STATES PATENT THOMAS SHAFFER, OF PHCENIXVILLE, PENNSYLVANIA, ASSIGNOR TO THE PH(ENIX IRON COMPANY, OF SAME PLACE.

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 276,086, dated April 1'7, 1883.

Application filed May 19, 1882. (No model.)

T all whom it may concern Be it known that I,THOMAS SHAFFER, a citizen ofthe United States, and a resident ot'Phoenixville,Ohestercounty,Pennsylvania,havein- 5 vented certain Improvements in Rolling-Mills,

of which the following is a specification.

My invention consists, mainly, in combining with grooved rolls and guides jaws for seizing the bar to be rolled,and mechanism whereby the IQ said jaws are caused to force the bar through the guides, deliver it to the rolls, and release the bar, all substantially as described hereinafter, the object of my invention being the more certain and accurate presentation of the bar to. the rolls than by the usual plan of directing it to the same by hand, and to prevent the usual losses resulting from imperfectlyrolled bars.

In the accompanying drawings, Figure 1,

Sheet 1, is a plan view, partly in section, of

rolls with my improvements; Fig. 2, a vertical section on the line 1 2, Fig. 1; Fig. 3, a perspective view of the guide-box and guides; Figs. 4 and 5, the shapes of thebar before and after it passes between the rolls; Figs. 6 and 7, Sheet 2, sectional diagrams illustrating the operation of my invention; and Fig. 8, a perspective view of the delivery-jaws.

A A are the housings, and B B the upper 0 and lower rolls,having journals cuadapted to hearings in the housings, between which is permanently secured the guide-box D, referred to hereinafter. In front of the rolls is a frame, composed in the present instance of two bars,

E E, and the cross-piece F, the frame resting on any suitable foundation, and the rear ends of the bars being preferably secured to the housings. These bars -E E are the supports and guides for the cross-plate G, carrying the jaws h h. It will be well to explain at this point the action and object of these jaws, reference being had to Figs. 4, 5, 6, and 7. We will suppose that a bar of the oval section shown in 4 has to be converted into a 5 round bar, Fig. 5, by one pass between the rolls. The oval bar is adjusted between the jaws and its end directed into the flaring-entrance to the guide in front of the rolls, when the jaws close on the bar, and, moving in the 0 direction of the arrow, Fig. 6, thrust the end of the bar between the guide-blocks p p to the 1 rolls, thejaws releasing the bar as soon as it has been seized by the said rolls. The main object of the delivery-jaws is to direct the heated bar to the guides, and thence to the rolls, with greater precision than can be effected by the usual plan of simply pushing the bar by hand through the guides. Thus it is important that the oval bar should be held in the position Fig. 4, and should be prevented 6; from turning as it isdelivered to the rolls; otherwise the bar might be imperfect throughout its entire length.

It has been found in practice that there is much less waste in bad bars when the delivcry-jaws are used than when the bars are fed by hand in the usual manner, and this is especially the casein making long bars and round bars of large diameters.

Different mechanical devices may be used in connection with the delivery-jaws5 but I will proceed to describe the mechanism which I have found to be available in practice, with-- out, however, desiring to restrict myself to that mechanism in carrying my invention into effect.

The jaws h h form parts of the levers H H, which are so shaped and so pivoted at b b to the cross-plate G that when the levers are moved on their pivots in the direction of the arrows, Fig. 1, thejaws will grip the bar, and when moved in the contrary direction, will release the same. Chains d (I, connected to the levers, pass over pulleysffon the guide-frame, and from the ends of the chains are suspended weights g g, which tend to draw thejaw-levers and the plate G, to which they are pivoted, awayfrom the rolls. The jaw levers are also connected by chainsi to a Windlass-shaft, I, adapted to suitable fixed bearings, m, and provided with a cog-wheel, J,int0 which gears a pinion, K, on a shaft which has its hearings in a frame or stand, M, and which is provided with a suitable handle, 20. Then the chain is unwound from the Windlass-shaft and the levers H H are under the influence of the weights gg, the 5 jaws will be open and ready for the reception of the heated bar. As soon as the end of the bar has been adjusted to the flaring entrance of the guides an operative stationed at the handle '10 turns the windlassshaft, moves the loo levers in the direction of the arrow, Fig. 1, and closes thejaws so as to grip the bar, after which the turning of the Windlass-shaft is continued, and both the jaw-levers and plate G are drawn toward the rolls. As soon as the rolls seize the bar and there is a pull on the latter the jaws will open and offer no resistance to the free passage of the remainder of the bar through the rolls. In the meantime the Windlass-shaft is so turned that the chains it will be unwound therefrom, thereby permitting the weights g g to draw the jaw-levers and plate Gr away from the rolls until the said plate G is arrested by stops g on the guide-bars, when the jaws will be in a condition to receive another bar. The pivots I) b of the levers H H are adjustable in the plate G, and hence'the jaws themselves are adjustable, so that their proper action on the bar may be assured. There is a grooved pulley, k, on a shaft, which has its hearings on brackets at the front end of the guide-frame, this pulley being adapted to the bar to be rolled, and thereby facilitating the proper introduction of the said bar between thejaws.

The guide-box D, instead of being attached to the housings in the usual manner, is fitted between the housings and bolted thereto, so as to become an integral part of the same, to insure permanence and stability, the guides 12 p fitting into the box, and being there secured by set-screws passing through a slot in the top of the box, and serving to secure the guides after adjustment.

Without claiming, broadly, the combination, with grooved rolls, ofjaws for seizing the .bar

and presenting it to the said rolls, I claim as my invention 1. The combination of grooved rolls B B and guides in front thereof with jaws-for seizing the bar, and with mechanism whereby the said jaws are caused to push the bar through the guide to the rolls, all substantially as set forth.

2. The cornbination,with the rolls and guides, of thejaws h h, the levers H H, of which the jaws form a part, the plate G, to which the said levers are separately pivoted, and mechanism whereby the said levers are operated and traversed to and fro on supporting-bars, all substantially as described.

3. The combination, with the rolls, of the jaw-levers H H, the plate G, to which they are pivoted, the Windlass shaft I, connected to the levers by chains, and mechanism whereby the said plate and levers are moved away from the rolls, all substantially as specified.

4. The combination of the plate G and its jaw-levers with the rolls, guides, and grooved pulley k, situated at the rear of the said jawlevers, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOS. SHAFFER.

Witnesses HARRY DRURY, HARRY SMITH. 

